Question

Algal blooms occur due to the presence of an excess amount of nutrients, like phosphorus, in fresh water. How does excess phosphorus get into fresh water?
A)
The nutrients are added to the water by fishermen to feed the fish.
Eliminate

B)
The nutrients leak into fresh water from oil refineries in the vicinity.


C)
The nutrients are a part of the fertilizers that are often washed away into ponds.


D)
The nutrients are formed by the decomposition of organic wastes dumped into fresh water.

Answer 1

I think the answer to your question would be letter C The nutrients are a part of the fertilizers that are often washed away into ponds.

Answer 2

Answer: Option C

Explanation:

The nutrients that is carried away by the water from the agricultural wastes are part of the fertilizer that is put on to increase the growth of the plants.

The nutrients from the fertilizer is carried away by the water that passed from the field to the nearby freshwater source.

The water carries phosphorus which increases the growth of the algal bloom in water. The algae uses all the oxygen from the water and makes the water deficient of oxygen.

Hence, the correct answer is option C